Karl bender and charles frederic teller



BENDER & TELLER.

. Hot-Air- Register. No. 76,388. Patented April 7. 1868.

KARL BEN DER AND CHARLES FREDERIC TELLER, OF BANHOFE OFFENBAGH, A. M., GRAND DUGHY OF HESSEN, ASSIGNQR TO MARTIN LOOHNER, OF NEWARK, NEWJERSEY.

Letters Patent No. 76,388, dated April 7, 1868.

' IMPROVEMENT IN THERMOSTATS.

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TO ALL-WHOM IT MAY CONCERN-i Be it knownthat we, KARL-BENDER, and CHARLES FREDERIG TELLER, of Banhofe Offenbach, A. M., in the Grand Duchy of Hessen, have invented a new and improved Thermos'tator Heat-Regulator; and we do hereby declare that the following is a full, clear, andexnct description thereof, which will enable those skilled in the art to make and use the same, reference being had to th'eaecompanying drawings, forming part of this speci fication. v

This inventionrelates to a new and improved self-acting apparatus or device for regulating the combustion of fuel in stoves, and keeping the temperature of an apartment at a uniform height. In the accompanying sheet of drawings Figure 1 is a front orface view of my invention.

Figure 2 a vertical central section of the same, taken in theline a: z, fig. 1.

Similar letters of reference indicate corresponding parts. i

The device may be applied to the door of a stove, or to any part which will admit of air passing over the fire, or it may be applied to a stove-pipe to admit of cold air passing therein to check the draught.

A representsa flange, which issccured in the door of a stove, in the side thereof, or in the stove-pipe, and

B is a register at the outer end of the flange, said register being composed of a fixed plate,'a, providedwith' radial openingsluhnd a rotating plate, 0, provided with radial openings d, similar to those of a, and of the same dimensions. Theplate c of the register is loaded at a point near its edge by a knob, O, the gravity of which has a tendency to keep the register closed, by moving it, when allowed, in the direction indicated by arrow 1. To the plate a. there is attached-a pin, d for the lower end ofan arm or lever,.D, to act against: This arm or lever is pivoted near its upper end to a plate E, which is attached to one end of the centre of a metal plate, F,- which is bent in the form of a coil, andhasits outcr'end attached to a piece of wood, G, or other poor conductor of heat, which is secured to a standard," H, connected to the flange A or fixed plate at of the register. The centre'of the coiled plate F is. a bar, 0, of. suflicient thickness to admit of being drilled longitudinally for a screw-rod, I, to pass through, said rod being provided with a crank, J, at its front or outer end, for the con venience of turningit, and also to serve as an index which works over a graduated dial-plate, K, at the outer side of the plate F. To the plate E, at the rear side of the bar e, there is secured, by a pivot,f, a bent or right angular arm, L, the outer end of which bearsagainst the upper end of. the arm or lever D, and forms a connec= tion between the coiled plate F, and the arm orleverD.

In adjusting the device for use, the rod I is turned to act upon the bent arm L, and adjust the arm or lever D so that the rotating plate a will be placed as desired 7 i l v In commencing, the plate a isgenera'lly allowed to close, the arm or lever D being so placed as to admit of the weight or knob C eflecting this.

When the fire is under way, the heat from the stove will expand the coiled plate F, and the arm or lever D will consequently be-moved in the direction indicated by arrow 2,'and-said arm or lever will turn the plaltec of the register, and open it to admit a current ofair over the fire andoheck the same as the temperature lowers, since the coiled plate F will cool and contract, and the arm or l'ever D will be moved in a reverse direction, n's indicated by arrow 3, and the knob or weight 0 will turn plate a, so as to close the register.

In moderate weather, thescrew-rod I may be turned so that the. arm or lever D will not allow the register to close, but kcep'it more or less open. By this means a moderate firetonly may be kept up.

In severe weather, the arm or lever should be so adjusted as to admit of the-register closing, and said arm or lever may have its lower end adjusted atsoiiie distance from the pin (2 so that an apartment may be well heated before air is admitted through the register. v

Thus by this simple means an apartment may be kept at a uniform temperature, and the combustion of fuel regulated to suit the stateof the weather, large fires' being kept up in severe weather, and smaller ones in moderate weather.

We claim as'new, and desire to secure by Letters Patent-- 1. Thev'coiled plate F, in combination with a register, B, and the arm or lever D, or its equivalent, all arranged substantially in the manner as and for the purpose set forth. I

v 2. The screw-rod I and bent arm L, for adjusting the arm or lever D, to regulate ,the temperature of the foam, substantially as shown and described.

3. The irideX-crank J on screw-rod I, in connection with the graduated dial-plate K, bent arm L, and the arm or lever 1), all ar 'angedsubstantially as am! for the purpose set fofth.

The above specification of our invention'signe'd by us, this 13th day of January, 1868.

KARL BENDER, 0. F. TELLER. 

